Vulnerability-Lookup

CNVD-2026-12561

Vulnerability from cnvd - Published: 2026-03-04

Title

Microsoft Defender for Linux代码执行漏洞

Description

Microsoft Defender for Linux是微软自带的杀毒安全软件。 Microsoft Defender for Linux存在安全漏洞，该漏洞源于输入验证不当，远程攻击者可利用该漏洞执行任意代码。

Severity

高

Patch Name

Microsoft Defender for Linux代码执行漏洞的补丁

Patch Description

Microsoft Defender for Linux是微软自带的杀毒安全软件。 Microsoft Defender for Linux存在安全漏洞，该漏洞源于输入验证不当，远程攻击者可利用该漏洞执行任意代码。目前，供应商发布了安全公告及相关补丁信息，修复了此漏洞。

Formal description

目前厂商已经发布了升级补丁以修复这个安全问题，请到厂商的主页下载: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21537

Reference

https://nvd.nist.gov/vuln/detail/CVE-2026-21537

Impacted products

Name
Microsoft Defender for Linux

Show details on source website

JSON

To clipboard

{
  "cves": {
    "cve": {
      "cveNumber": "CVE-2026-21537",
      "cveUrl": "https://nvd.nist.gov/vuln/detail/CVE-2026-21537"
    }
  },
  "description": "Microsoft Defender for Linux\u662f\u5fae\u8f6f\u81ea\u5e26\u7684\u6740\u6bd2\u5b89\u5168\u8f6f\u4ef6\u3002\n\nMicrosoft Defender for Linux\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u8f93\u5165\u9a8c\u8bc1\u4e0d\u5f53\uff0c\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002",
  "formalWay": "\u76ee\u524d\u5382\u5546\u5df2\u7ecf\u53d1\u5e03\u4e86\u5347\u7ea7\u8865\u4e01\u4ee5\u4fee\u590d\u8fd9\u4e2a\u5b89\u5168\u95ee\u9898\uff0c\u8bf7\u5230\u5382\u5546\u7684\u4e3b\u9875\u4e0b\u8f7d:\r\nhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21537",
  "isEvent": "\u901a\u7528\u8f6f\u786c\u4ef6\u6f0f\u6d1e",
  "number": "CNVD-2026-12561",
  "openTime": "2026-03-04",
  "patchDescription": "Microsoft Defender for Linux\u662f\u5fae\u8f6f\u81ea\u5e26\u7684\u6740\u6bd2\u5b89\u5168\u8f6f\u4ef6\u3002\r\n\r\nMicrosoft Defender for Linux\u5b58\u5728\u5b89\u5168\u6f0f\u6d1e\uff0c\u8be5\u6f0f\u6d1e\u6e90\u4e8e\u8f93\u5165\u9a8c\u8bc1\u4e0d\u5f53\uff0c\u8fdc\u7a0b\u653b\u51fb\u8005\u53ef\u5229\u7528\u8be5\u6f0f\u6d1e\u6267\u884c\u4efb\u610f\u4ee3\u7801\u3002\u76ee\u524d\uff0c\u4f9b\u5e94\u5546\u53d1\u5e03\u4e86\u5b89\u5168\u516c\u544a\u53ca\u76f8\u5173\u8865\u4e01\u4fe1\u606f\uff0c\u4fee\u590d\u4e86\u6b64\u6f0f\u6d1e\u3002",
  "patchName": "Microsoft Defender for Linux\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e\u7684\u8865\u4e01",
  "products": {
    "product": "Microsoft Defender for Linux"
  },
  "referenceLink": "https://nvd.nist.gov/vuln/detail/CVE-2026-21537",
  "serverity": "\u9ad8",
  "submitTime": "2026-02-25",
  "title": "Microsoft Defender for Linux\u4ee3\u7801\u6267\u884c\u6f0f\u6d1e"
}

CVE-2026-21537 (GCVE-0-2026-21537)

Vulnerability from cvelistv5 – Published: 2026-02-10 17:51 – Updated: 2026-04-10 13:21

Title

Microsoft Defender for Endpoint Linux Extension Remote Code Execution Vulnerability

Summary

Improper control of generation of code ('code injection') in Microsoft Defender for Linux allows an unauthorized attacker to execute code over an adjacent network.

Severity ?

8.8 (High)


                        
                          CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

CWE

CWE-94 - Improper Control of Generation of Code ('Code Injection')

Assigner

microsoft

References

URL

Tags

https://msrc.microsoft.com/update-guide/vulnerabi…

vendor-advisorypatch

Impacted products

	Vendor	Product	Version
	Microsoft	Microsoft Defender for Endpoint for Linux	Affected: 101.0.0 , < 1.0.9.0 (custom)

Date Public ?

2026-02-10 16:00

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-21537",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-02-11T04:55:57.681192Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-02-26T14:44:45.605Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Microsoft Defender for Endpoint for Linux",
          "vendor": "Microsoft",
          "versions": [
            {
              "lessThan": "1.0.9.0",
              "status": "affected",
              "version": "101.0.0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:a:microsoft:defender_for_endpoint:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "1.0.9.0",
                  "versionStartIncluding": "101.0.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "datePublic": "2026-02-10T16:00:00.000Z",
      "descriptions": [
        {
          "lang": "en-US",
          "value": "Improper control of generation of code (\u0027code injection\u0027) in Microsoft Defender for Linux allows an unauthorized attacker to execute code over an adjacent network."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
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              "value": "GENERAL"
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      ],
      "problemTypes": [
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              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-10T13:21:20.277Z",
        "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
        "shortName": "microsoft"
      },
      "references": [
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          "name": "Microsoft Defender for Endpoint Linux Extension Remote Code Execution Vulnerability",
          "tags": [
            "vendor-advisory",
            "patch"
          ],
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21537"
        }
      ],
      "title": "Microsoft Defender for Endpoint Linux Extension Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
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    "datePublished": "2026-02-10T17:51:32.870Z",
    "dateReserved": "2025-12-30T18:10:54.848Z",
    "dateUpdated": "2026-04-10T13:21:20.277Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

CNVD-2026-12561

CVE-2026-21537 (GCVE-0-2026-21537)

Tags

Sightings

Nomenclature